Excellent utility which monitors outgoing traffic & notifies of how many IPs some programs connect to (such as Skype). If being infected, one of the first things malware does is 'call home' which will allow you to block it. Probably, one of the best security software tools, you wont regret buying it.
This is the best thing I've found for alerting me to apps that are trying to make outgoing Internet connections. The amount of control I have over when those connections are allowed, and who can make them, is invaluable to me. Simply put, this is one of 2 pieces of software that I've owned for many years, that I've never regretted spending the money on. ChronoSync is the other one.